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Both raw and Mn2+-modified bentonite clay have high pHpzc indicative of clay dominated by alumino-silicate materials and manganese oxides. Modification of the raw bentonite clay with Mn2+ increases the pHpzc and which extends the pH range for adsorption of .
The adsorption of NO molecules on Mn-doped CeO2 (111) surfaces for NO oxidation has been studied by employing the periodic density functional theory plus U (DFT+U) method. Through our calculations, it is demonstrated how Mn-doped CeO2 with superior NO oxidation activity benefits from the high mobility of the oxygen near the Mn cations. On unreduced Mn-doped CeO2 (111) surfaces, the NO molecule ...
Sep 13, 2019· 1. J Hazard Mater. 2019 Sep 13;384:121229. doi: 10.1016/j.jhazmat.2019.121229. [Epub ahead of print] Adsorption behavior and mechanism of arsenic on mesoporous silica modified by iron-manganese binary oxide (FeMnOx/SBA-15) from aqueous systems.
Mar 20, 2020· Fabrication of sustainable manganese ferrite modified biochar from vinasse for enhanced adsorption of fluoroquinolone antibiotics: Effects and mechanisms. Author links open overlay panel Yujia Xiang a 1 Xiao Yang b 1 Zhangyi Xu a Wenyong Hu c Yaoyu Zhou a b Zhonghao Wan b Yuhui Yang a Yuyi Wei a Jian Yang a Daniel C.W. Tsang b.
Ions adsorption capacity by different manganese oxide coated adsorbents. Ions Mn-coated material Q max (mg/g) References As+3 Manganese oxide-coated-alumina 425 20 Cd+2 Manganese oxide modified Diatomite 26.6 21 Cu+2 Manganese oxide modified Bentonite 105.4 22 Cu+2 Manganese oxide coated zeolite 9.9 14
While modified the diatomite with sixteen alkyl trimethylamine bromide solution, manganese dioxide and calcium carbonate, the effects of diatomite dosage, adsorption time and initial pH value on ...
A novel organic-modified aluminum-manganese bimetal oxide (OABO) adsorbent was fabricated to adsorb nitrate and phosphate from wastewater and reduce eutrophication risk. Several techniques were applied to investigate the surface characteristics of OABO. The characterization results showed that OABO has multiple functional groups, including hydroxyl groups, impregnated sulfate ions, grafted ...
May 01, 2002· Adsorption studies of strontium on manganese dioxide from aqueous solutions. The International Journal of Applied Radiation and Isotopes 1981, 32 (12), 899-904. DOI: 10.1016/0020-708X(81)90076-4. Syed Moosa Ha, Mudassar Ahmed Qureshi. Adsorption studies of cobalt(II) on manganese dioxide from aqueous solutions.
The arsenic adsorption capacity of a manganese oxide-modified biochar composite (MBC), prepared by pyrolysis of a mixture of potassium permanganate and biochar, was investigated in red soil. Adsorption experiments using batch procedures were used to estimate the arsenic adsorption capacities of the absorbent materials.
In this study, manganese dioxide was evenly distributed on the surface of activated carbon (AC), and the porous structure of AC and the surface functional groups of manganese diox
Modified natural zeolite ZeoCem Mn [17] with main component of clinoptilolite was used in the experiments. ZeoCem Mn was separated by colour to dark and light to create two new adsorbents, since it is assumed that the dark grains contain higher amount of MnO 2 on their surface, i. e. the adsorption capacity for Mn(II) ions will be
Nov 01, 2015· The arsenic adsorption capacity of a manganese oxide-modified biochar composite (MBC), prepared by pyrolysis of a mixture of potassium permanganate and biochar, was investigated in red soil. Adsorption experiments using batch procedures were used to estimate the arsenic adsorption capacities of the absorbent materials.
Journal of hazardous materials 2011-7-19 Adsorption of Zinc(II) on diatomite and manganese-oxide-modified diatomite: a kinetic and equilibrium study. [Necla Caliskan, Ali Riza Kul, Salih Alkan, Eda Gokirmak Sogut, Ihsan Alacabey]
Diatomite modified by microemulsion (DMM) and manganese oxide (MnD) were used for the removal of chromium ion (III) from aqueous solution. The characters and performance of these two types of modified diatomite on chromium ion (III) adsorption were compared to each other. The results indicate that the chromium ion (III) sorption capacities of ...
Initial investigations established the effectiveness of manganese oxides-modified diatomite (MOMD) to remove basic and reactive dyes from aqueous solution. The adsorption capacity of MOMD for methylene blue (), hydrolysed reactive black (RB) and hydrolysed reactive yellow (RY) was 320, 419, and 204mg/g, respectively.
molecules Article Adsorption Properties of Nano-MnO2–Biochar Composites for Copper in Aqueous Solution Li Zhou 1,2,†, Huang 2,†, Weiwen Qiu 3, Zhanxiang Sun 4, Zhongqi Liu 2 and Zhengguo Song 2,* 1 College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China; lily_621@163 2 Agro-Environmental Protection Institute, Ministry of Agriculture of China ...
using the zinc ion (Zn2+) adsorption method. Here, 2.00 g of manganese oxides-modified diatomite were mixed with 25 mL of Zn2+ solution (2 M ammonium chloride [NH4C1], 0.1 zinc chloride [ZnCl2]) in a 100 mL flask. The mixture was agitated for 24 h and then allowed to stand overnight. The supernatant solution was analyzed for Zn2+ using atomic ...
S.-J. Park, Y.-S. Jang, Pore structure and surface properties of chemically modified activated carbons for adsorption mechanism and rate of Cr(VI), J. Colloid Interface Sci., 249 (2002) 458–463. Q. Zhou, X. Jiang, Y. Guo, G. Zhang, W. Jiang, An ultra-high surface area mesoporous carbon prepared by a novel MnO-templated method for highly ...
This paper researched the adsorption properties of modified Manganese sand to the high content of Manganese in groundwater, the adsorption effect of modified Manganese sand were studied by the single factor such as adsorbent dosage, time, temperature and pH, through orthogonal experiment, the best absorption condition was determined. The results show that: the absorbed ratio of the modified ...
Adsorption Behaviour of Modified Zeolite as Novel Adsorbents for Fluoride Removal from Drinking Water: Surface Phenomena, Kinetics ... removal of manganese by manganese oxide coated zeolite [41], removal of strontium and potassium ions by synthetic zeolite .
The present study investigated the optimization of arsenic adsorption onto natural clinoptilolite (NC-Na). Response surface methodology in combination with Box–Behnken design was used to optimize the parameters of the adsorption process. Solution pH, temperature, and initial arsenic concentration were chosen as the main process variables, and the amount of arsenic adsorbed was selected as ...
Dec 12, 2019· 1. Sci Total Environ. 2019 Dec 12;709:136079. doi: 10.1016/j.scitotenv.2019.136079. [Epub ahead of print] Fabrication of sustainable manganese ferrite modified biochar from vinasse for enhanced adsorption of fluoroquinolone antibiotics: Effects and mechanisms.
Feb 16, 2006· Kinetics and thermodynamics of the phosphine adsorption on the modified activated carbon. Frontiers of Chemical Science and Engineering 2011, 5 (2), 203-208. DOI: 10.1007/s11705-010-0571-0. Weihua Zou, Lei Zhao, Runping Han. Adsorption characteristics of uranyl ions by manganese oxide coated sand in batch mode.
Kinetics and thermodynamics of the phosphine adsorption on the modified activated carbon. Frontiers of Chemical Science and Engineering 2011, 5 (2), 203-208. DOI: 10.1007/s11705-010-0571-0. Weihua Zou, Lei Zhao, Runping Han. Adsorption characteristics of uranyl ions by manganese oxide coated sand in batch mode.
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